Morpheme
-idium
Type
suffix
Denotation
(1) diminutive suffix; (2) taxonomic suffi; (3) scientific suffix for naming bodily structures, organs, cellular processes
Etymology
Ancient Greek -ídion
Evidence
basidium, brachidium, chilidium, chromidium, glochidium, gonidium, limbidium, ommatidium, phyllidium, spermidium, thyridium